Review on ✂️ Bosch HS1969 Square Carbide Spline: Enhanced Performance and Durability for Precision Cutting by Ron Patel

I used it to prepare about 100 square meters. Painted concrete feet. The concrete was very hard. The non-carbide drill bit I tried became very dull within 10-15 minutes. This one was fairly quick, although needle sharp and took an hour before losing its sharpness, but still sharper than the newer non-carbide model. When sharp, this attachment works faster than using a high-speed grinder (which I've tried). I used two of these for speed but I was only able to use one. If you don't already have one, you must have a Bosch HS1927 to use it. I used the lighter Bosch RH540M SDS-Max, if you have one of the heavier models you may have a different experience.